Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e62650267c8f904…

MALICIOUS

PDF

79.4 KB Created: 2021-04-07 08:04:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 1ee2b5289c1a710faafc3193a96159ce SHA-1: c732116c9efd91f503619d92f51af9905133cacd SHA-256: 7e62650267c8f9048e4361e06d69891989861ed85aeec9330e8bbbfd8398e354
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://mezovuduw.ru/award?keyword=weight+loss+exercise+at+home+pdf PDF link annotation
    • https://cdn.sqhk.co/nibijegun/jbLhcie/28652964220.pdfIn PDF document text
    • https://cdn.sqhk.co/pemenixa/jiif3Ay/wukatejepudusisubal.pdfIn PDF document text
    • https://cdn.sqhk.co/fumazuri/onjjhck/875330945.pdfIn PDF document text
    • https://cdn.sqhk.co/zelosoza/NThaWM3/99957043608.pdfIn PDF document text
    • https://cdn.sqhk.co/govonesed/ieghdLV/jumozipatujuzes.pdfIn PDF document text
    • http://gisoboxizaza.mygamesonline.org/what_is_the_best_gout_diet.pdfIn PDF document text
    • http://xamawigokoke.mygamesonline.org/vertical_integration_in_supply_chain_management.pdfIn PDF document text
    • https://cdn.sqhk.co/doparibi/HUhbsOm/85353589342.pdfIn PDF document text
    • http://vogolimipogusoz.mypressonline.com/tegaratamupekevi.pdfIn PDF document text
    • https://cdn.sqhk.co/tejosepu/hheOiaT/spray_fast_stencil_art_templates_12_sheets_set.pdfIn PDF document text
    • http://vozivovog.scienceontheweb.net/tcp_ip_model_explained_for_dummies.pdfIn PDF document text
    • http://nemugub.mywebcommunity.org/a_history_of_magic_by_bathilda_bagshot_download.pdfIn PDF document text
    • https://cdn.sqhk.co/kuwusemob/CtgeAkE/xujugu.pdfIn PDF document text
    • https://cdn.sqhk.co/tategupet/0IrTgdu/65680529391.pdfIn PDF document text
    • https://niwubeleligijoz.weebly.com/uploads/1/3/4/7/134764474/5586152.pdfIn PDF document text
    • https://tasidumil.weebly.com/uploads/1/3/2/6/132680907/lurabuzelajatagopepo.pdfIn PDF document text
    • https://jasevumoxemu.weebly.com/uploads/1/3/4/7/134707335/bdc8c8e00dc0092.pdfIn PDF document text
    • https://kegewibenufugix.weebly.com/uploads/1/3/2/6/132682471/taxugarifuripi.pdfIn PDF document text
    • https://zuduloto.weebly.com/uploads/1/3/4/6/134623707/gipibewuxu.pdfIn PDF document text
    • https://damesijegimu.weebly.com/uploads/1/3/4/6/134624484/324561.pdfIn PDF document text
    • http://worabipupe.mypressonline.com/biometric_time_attendance_system.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jugomirusulove.atwebpages.com/83829672505.pdfIn PDF document text
    • http://teluroluxeterez.myartsonline.com/34464508522.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f86e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF86E 5652 bytes
SHA-256: a545f0a8450b4e30afc07c3f774730546cf054d913a31c08cb59d1f42a52612c
font_01_sfnt_off00010b94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B94 10664 bytes
SHA-256: b8d0763e9fe1da1a41708ab5ae017e1aea6d84409c8fe061435953fffe2ae080

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